What is the importance of track by in the ng-repeat directive?

What is the importance of track by in the ng-repeat directive?

题目类型: 技术面试题

这是一道技术面试题，常见于澳洲IT公司面试中。

难度: hard

标签: interviewbit, angularjs, topic-specific, javascript, frontend

参考答案摘要

ng-repeat directive helps to keep track of all DOM elements dynamically to minimize DOM creation and rendering. It is achieved by storing the instances of the object whenever a new element gets added ...

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